In a team of four, I owned how live sensor data from UTS Building 11 was visualised as a planet: people as buildings, CO₂ as clouds, oxygen as trees and temperature as colour, so it could be understood at a glance.
One particularly notable outcome from the testing was adding a slider to let users control the speed of the time period flow, adding a simple but meaningful personalisation and layer of user interaction. If I did it again, I would test it with people seeing it for the first time, to confirm it could be understood without an explanation.